Glass-manufacturing machine and method



Sept. 13, 1927.

P. SCHOONENBERG GLASS MANUFACTURING MACHINE AND METHOD M/VE/V 70/? I I P Sumo/2010a a fiLI u I w M q I AV/g s Filed Jan.14, 1927 Patented s n. 13.1927. 1,642,312 UNITED STATES PATENT OFFICE.

PANCRAS SCHOONENBEBG, OF EI'NDHOVEN, NETHERLANDS, ASSIGNOB TO N. V.

PHILIPS GLOEILAMPENFABRIEKEN, F EINDHOVEN, NETHERLANDS.

GLASS-MANUFACTURING MACHINE AND METHOD.

Application fil ed January 14, 1927, Serial No. 161,205, and in the Netherlands, August 20, 1928.

This invention relates to a process of convantage in that the two glass layers can I tinuously drawing tubes or rods composed be heated simultaneously so that it is posof several glass layers which are fused tosible to heat them to the same temperature, gether. Indeed, it is in practice often dewhich assists the homogenity of the product.

sirable to coat glass tubes with a surround- According to the invention thev machine ing glass layer or to apply thereto a certain for drawing tubes and rods composed of trade mark in the shape of a coloured stripe. several glass layers which are fused together According to the invention, for this purcomprises a rotary member and several feedpose various currents of glass are caused to ing devices for feedin the various currents flow on to a rotating member so as to forms of glass. These feedlng devices may be glass layers which are fused together after either all rotary or all stationary, the effect which the glass is drawn off the end of the hereinbefore described (that .is to say the said member into the shape of a tube or striped tube or rod) being ensured by a comrod. For carrying out this operation there bination of a stationary and a rotary feedare various courses open. In the first place ing device.

a current of glass may be fed and may be According to an embodiment of the in; caused to form a glass la er on the member, vention the wall of the member is provided after which glass in a used state may be with apertures. that form part of a glass caused to flow on to said layer, the arrangefeeding device. In the case of a hollow, ment being such that the glass layers cover cylindrical or conical body of revolution beeach other entirely or partially. It is, how ing used the feeding devlces may be so arever, also possible to cause the current of ranged that one current of glass flows on to glass to flow on to two different points of the the inner surface and the other current of surface of the member so as to be helically glass on to the outer surface of the body, wound around each other and to permit the wall of the body being provided with of certain colouring effects being brought apertures which permit the glass collected about. According to the invention it is also on the outer surface to flow towards the possible to feed one of the currents of glass inner surface. By reason of one current of on to .the member by a stationary feeding glass flowing through the apertures on to the device and one or more other currents of inner surface, the currents of glass thus proglass by one or more rotary feeding devices. duced will partially cover the other cur- The latter process enables a rectilinear ribrent of glass, which ensures that the drawn bon or stripe to be produced on the surface tube or rod will present stripes the number of the drawn rod or tube. of which corresponds to the number of aper- The term member is to be understood tures provided in the wall of the cylinder.

to mean here equally well a mandrel-shaped According to the invention if it is yet debody as a cylindrical body, either solid or sired to manufacture in this manner a tube coated with an entirely or partially covering or rod composed of two layers surrounding layer (for example glass) The member each other entirely,-the wall. of the body of may equally well be composed of one as of revolution may be provided with an annular two parts, for example in th case of two fissure or witlf several ring segment-shaped members servin as glass distributors, and fissures that overlap each other.

the layers thus ormed uniting subsequently. The accompanying drawings illustratean to mean equally well a ribbon-shaped as a drawings:

stripe-shaped as a helical layer. Figure 1 is a According to the invention one current of chine comprlsmg a hollow rotary glass may becaused to flow on to the inner and a stationary and a rotary glass surface of a hollow body ofrevolution and device. the other current of glass on to the outer Figure 2 is a cross sectional view of a surface of the said body, the wall of the cylinder provided with several rotary glass rtures that feeding'devices.

body being provided with age permit the glass collected on t e outer wall F1 re 3 1s a s read wall of the cyhnder with a specially shaped toflow towards the inner surface. The use whic is provid of a hollow cylinder has an additional adfissure.

cross sectional view of a macylinder eedmg The term glass layer is to be understood embodiment of the invention. In the said As shewn in the drawing the apparatus comprises essentially a glass furnace 1 and a hollow downwardly inclined rotary cylinder 2. This cylinder is journalled in bearings 13 and'la and has seated on it a gear wheel 17 which meshes with a gear wheel 18 actuated b a source of energy (not shewn). The cylin er 2 is surrounded by insulating material 3 and a winding t which serves to electrically heat the wall of the cylinder. Tn addition the cylinder is provided with a conical part 6 whichtogether with a collar 7 (Fig. 2) and a flat ring 8 forms a kind of reservoir into which glass is enabled to flow by means of chutes 11 and 12. These reservoirs communicate by means of apertures 10 with the cavity of the cylinder so as to permit the glass to flow from the reservoir on to the inner surface of the cylinder. I The process is carried out as follows? The molten glass 5 will flow from the furnace 1 on to the rotary cylinder 2, whilst another current of glass (for example coloured glass) is being fed simultaneously on to the conical outer surface 6 of the cylinder 2. lit will collect on the latter and flow through the aperture 10 of the wall of the I cylinder 2. The glass thus entering will flow down the cylinder and contact closely with the other current of glass, so that it wlll.

, cover the latter partially and be fused together with it. By then drawing the glass out into a tube or rod the surface of the latter will present a stripe or ribbon.

Figure 2 shows an embodiment of the invention comprising in addition to, the ordinary glass supply two separate glass feeding devices, for example one for blue and one for red glass (A and B). Now, the apertures 10 may be provided in the surface of the cylinder so as to produce a certain combination of lines on the outer surface of the drawn tube or rod. If it is wished to apply to the tube instead of lines an entirely surrounding coat the wall of the cylinder may be provided with an annular fissure or this aperture may be given an outline as shewn in Figure 3 on the spread wall of the cylinder. The glass will flow through said fissures on to the inner surface of the cylinder and form there a separate coat which is fused together with the glass 5.

It will be apparent from the construction described that the apertures 10 rotate at the same rate as the cylinder 2. However, the part of the cylinder wall in which these apertures are provided may be mounted separately from the cylinder wall and may be given a relative motion relatively to the cylinder. It is thus possible to apply helical stripes on the tube and to vary their pitch. The rotary feeding device may also be constructed as a rotary chute which covers the glass coat formed on the member with another coat or squirts the latter on it.

It is evident that the invention is not limited to a hollow cylinder, it is also possible to cause glass to flow on to a rotary mandrel and either to feed a second current of glass on to the layer produced or to provide the surface of the mandrel with a e1- tures that permit the second current ofg ass to issue and to unite with the former one.

What ll claim is:

l. A method of continuously drawing tubes or rods being composed of several glass layers which are fused together con sisting in supplying various currents of glass to a rotating member so as to form layers which are fused together, drawing the lass from the end of sald member into the s ape of a tube or rod.

2. A method of continuously formingv glass being drawn from the end of said member in a cylindrical form.

3. The method of continuously forming tubes or rods composed of several glass layers which are fused together consisting in permitting molten material to flow'on the surface of a rotating member, said current forming a layer on said member, supplying a second current of molten material on said layer the method being such that the glass layers cover each other entirely or partially and drawing the glass of the end of said member into the shape of a tube or rod.

4. The method of continuously drawing tubes or rods composed'of several glass layers which are fused together consisting in feeding a current of molten glass to the surface of a rotating member, at the same time feeding a second current to the sur face of the same member, the two layers of glass being fused together on the member and drawing the glass from said member into the shape of a tube or rod.

5.-A method of continuously drawing tubes or rods composed of several glass layers which are fused together, consisting in directing a flow of molten material from a stationary feeding device to the surface of a rotating member and directing at least one other current from at least one revolving feeding device to the surface of said ing layers on the surface of said cylinder, the glass being drawn from the discharge end of said cylinder into the shape of a tube or rod.

7. A method of continuously drawing tubes or rods composed of several glass layers which are fusedtogether consisting in directing a current of'molten glass to the tubes or rods composed of several glass layers which are fused together consisting in permitting a stream of molten metal to flow onto an inclined rotating mandrel, the stream of glass formin a layer on said mandrel directing a secon and a third stream of glass on the so-formed glass layer and drawing the glassfrom the end of said-layer into the shape of a tube or rod.

, 9a A method of continuously drawing molten material incylindrical form, said" material being composed of several glass layers fused together consisting in permitting v molten glass to flow in ,a regulated stream on a rotating member disposed within a furnace, the glass winding itself around this member and being evenly distributed over the surface of same, permitting a second carrent of molten material to flow onto the layer on said rotatin member said second current being evenly dlstributed over the glass layer ,of said member and drawing-the glass from the end of said member into a shape of tube or-rod.

10. A machine for drawing tubes orrods composed of several glass layers which are fused together comprising a rotating member and at least two glass feeding devices.

11. A machine for drawing glass in cylindrical form, said glass being composed of several glass layers, comprising .a rotating member, at least one stationary and at least onerot'atable glass feeding device;

12. A machine for drawing tubes or rods composed of several glass layers which are fused together compnsing a rotating memher and at least two rotatable glass feeding l devices.

13. A machine for drawing glass in lindrical form said glass being composed o several glass layers fused together comprisin a rotating member, the wall ofsaid main 1' being provided with-apertures which form part of a glass feeding deviceand stationary means for directing a flow of molten glass on said member. I

14. A machine for drawing tubes or rods composed of several glass layers which are fused together COIIIPIlSlIl a hollow cylinder and at least two means or directing a flow of molten glass on said cylinder, one of said 4 means feeding the glass into the inner sur face and the other means feeding the glass onto the outer surface of the c linder, the

wall of the c linder being provi ed with apertures whic permit the glass collected on the outer surface of the cylinder to flow towards the inner surface.

15. A machine for drawing tubes or rods composed of several glass layers which are fused together compr sing a mandrel arid at least two means for d1recting av flow of molten glass on said mandrel one of said means feeding'the glass onto the outer sur face of the mandrel and the other means being rotatable and directing molten material onto the same surface, said glass streams forming layers onsaid mandrel and bein drawn off the discharge end of the mandre "16. Themachine of claim 13 in which the apertures are formed by ring-segment shaped fissures that overlap each other.

v 17. The 'machineof claim 14 in which the apertures are formed by ringx-segment shaped fissures that overlap each er.

In testimon whereof, I aifi my signature at the city o Eindhoven, this 23rd day of December 1926. v

PANORAS SCHOONENBERG. 

